exchange-2.0/database/migrations/2022_04_15_211421_create_notifications_table.php

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

use App\Classes\ValueObjects\Constants\ApprovalStatus;

class CreateNotificationsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('notifications', function (Blueprint $table) {
            $table->id();
            $table->string('title');
            $table->text('description');
            $table->morphs('subject');
            $table->morphs('target');
            $table->morphs('causer');
            $table->integer('status')->default(ApprovalStatus::APPROVED);
            $table->softDeletes();
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('notifications');
    }
}